import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';

const root = ReactDOM.createRoot(document.getElementById('root'));
{/* <React.StrictMode></React.StrictMode> 严格模式 */}
root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);

/* 
  新版不支持改写法
  ReactDOM.render(
    (<React.StrictMode>
      <App />
    </React.StrictMode>), document.getElementById("root")) 
*/

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();
